Multiplying machine



arch I J. w. BRYCE w MULTIPLYING MACHINE 4 Filed April 22. 1921 11 Sheets-Sheet 1,

March 29, 1921. 1,622,279

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- J. W. BRYCE MULTIPLYINQ MACHINE Filed Apfii 2 1921 1; Sheets-Sheet s March 29 1927;

v J. w. BRYCE MULTIPLYING MACHINE '11 Sheets-Sheet 4 Filed April .22. 1921 51mm to;

1',622',2 March 29, 1927. J. w. BRYCE 79 MULTIPLYING MACHINE Filed A ril 22, 1921 11 Sheets-Sheet 5 Save 01 T mu/t y k J. W. BRYCE MULTIPLYING MACHINE March 29, 1927. 1,622} 79 Filed April 22. 1 2 11 Sheets$heet e lllllllllll 'IIIIIIIIIIIIIIII! fl-lllllllll March 2 1927' J. w. BRYCE MULTIPLYI NG MACHINE Filed April 22. 1921 11 Sheets-Sheet v o--o I --nvhwl-mo o Amy- 0050 0 Sum/W501 R a VFW ilk/$ k MW, r-"W March 29,1927. 1,622,279

J. w. BRYCE MULTIPLYING MACHINE Filed April 22. 1921 11 Sheets-Sheet s u M E m i .S .QR/M m T fi vmn m w O 3 a n 43% at 1, 2 March 29, 1927. J. w. BRYCE 6 2279 MULTIPLYING MACHINE Fil d A i 22/." 1921 ll Sheets-Sheet 9 l'V/T'S TENS March 29, 1927. J. w. BRYCE 1,622,279

MULTIPLYING MACHINE Fi April 22. 1921 11 Sheets-Sheet 10 Patented Mar. 29, 1927.

vuN-rnao srATEsrA'raNToFFicE.

:ms w. names; or nmonmon, nw YORK. Assmnon To rm: nrrma'nolan rm RECORDING QOIPAN'Y 01 NEW m'rnmmo you, n. 1., A conromrron or new Your.

Application .m April as, 1921. ser al 80. $3,534.

The invention subject of my-present application for- Letters Patent is a new and improved multiplying machine;- The machine is provided with means such as keys which correspond to digits and these keys are in two sets or banks. those of one bank.

corresponding to the digits of the multiplicand and those of the other set'or bank to' the digits of themultiplier. When the keys 1 of these respectivebanks are depressed or lected and of set, themachine is adapted by a simple and single operation, such as the mere turning of a handle to perform the entire operation -of multiplying the two numbers thus seregistering, recording or indicating the product and resetting or clearing the mechanism. I have devised the machine-in this form, but the specific arrangement of the parts or their construction are not of the essence of the invention and may be modified and varied at will.

The inventionembodies and depends for its success upon the discovery by meof a certain element or piece of mechanism which has no name inthe art and which, for want of a better designating term I shall hereinafter call a multiplying slug, adopting this term from shop parlance where it is usedto" define the said new device. y

This multiplying slug is constructed in any suitable form according to the following principle: Such a device as a small rectangular insulating plate carries along each vertical edge two rows of ten contacts which may be assumed to be numbered downward from O to 9 and for use in the machine nine of such slugs are provided for each column of figures or order of units in the multiplier.

contacts on each side of the slug are connected across according to a fixed rule de-,

termined by the multiplication table. Let us take any slug, for example, that corresponding to the number 2'uuit' in the multiplier.the top contacts are connected di-' rcctly across; the second contact on the left side is connected to the third contact on the right on the theory that 2 times 1 is 2-. The third contact on the left is con- ,tens column in the The oppositely disposed nected .to the fifth contact on the-right on the theory that 2 times 2 is 4 and in similar manner the fourth contact on the left is connected to the seventh-contact on the right andltthe fifth on the left to the ninth on the mg The sixth contact or that numbered 5 on the left is connected to thefirst'or zero contact on the right. the seventh to the third, the eighth to the fifth, the ninth to the seventh and the tenth to the ninth. I On the opposite side; of the slug are contacts which arereleated to and control the product; Of these the first five contacts on the left are connected to'the first or zero contact on the right, while the remaining five contacts on the left are all connected to the second or unit contact on the right, because two times five is ten;' two times six is twelve; and soon. Here it will be noted that the multiplications give a resultant characteristic of one in'the tens column of the product.

Consider now a very simple case of multiplication, say 2 times 4. One of the contacts or that corresponding to 4 units in the nultiplicand is connected with a source of current by the depression of the 4 unit key, and by the operation of the selective mechanism the multiplying slug for the 2 units is moved up so that the ten contacts on its left engage the ten stationary multiplicand contacts including the active contact 4. The

result of this is to connect this 4 contact with the 8 contact on the right of the slug and if by any proper means the latter is caused to close the proper magnetic circuit, in a counter the units wheel of that device will be moved eight spaces.

Take as another simple example, to multiply 6 by 2. The multiplicand contact corresponding to 6 units is rendered active, multiplying slug corresponding to.2 is moved to operative position whereby the seventh contacts on bothsides of the slug to the left engage with the corresponding or 6 units contacts of the multiplicand. By this means the 2 product contact to the right in the unit column is rendered active'and the 1 product contact to the right on the tenscolumn also,

I set of s ugs,

6 grams which are necessary 4 wheel of a counter 2 steps and the tens wheel 1.

This is the principle of 'operation of the new device. How it is carried out in the case of numbers containing two or more orders of units in either multiplicand or multiplier will be more fully explained in the accompanying specification.

In the accompanying drawings:

-Figure 1 is a top lan view of the instrument, the cover being removed to display the operative parts. t

Fig. 2 is a sideelevation of the exterior portions of the working mechanism.

Fig. '3 is a sectional view on the line 3-3 of Fig. 4. i

Fig. 4 is a sectional view on the line 4-4 of Fig. 3.

Fig. 5 is an enlarged detail view of a sun-' flower circuit closer.

Fig. 6 is a part sectional view of a series of these devices mounted on a shaft.

Fig. 7 is anenlarged view of one of the multiplying slugs and its contacts.

Fig. 8 is a top and sectional view of a one of which is shown in Fig. 7.

Figs. 9 and 10 are detail views of certain parts.

.Fig. 11 is an enlarged sectional view of certain of the keys and other devices controlled thereby.

-Fig. 12 is a top plan and part sectional view of the recording wheels.

Fig. 13 is another viewof portions of Fig. 7 showing the parts in different relations.

Figs. 14. 15, 16, 17,18 and 19 are diato a correct understanding of the invention.

The counter employed in the present ma-' chine which is marked 10 may be of anv approved type adapted to display totals on indicating wheels and to set up the totals. on type wheels. The particular counter herein shown and described is that set forth in patent to C. D. Lake, No. 1.307,?40. dated June 24, 1919. This counter or totalizer contains a number of wheels of different denominational orders and the controlling of the operation of these'wheels is dependent upon circuits being closed at definite points in the rotation of a shaft which bears the totalizer wheels. The closure of these circuits clutch. the individual totalizer wheels to the shaft and the totalizer. wheels are-released at a predetermined point in the rota.- tion of the shaft.

The counter controlling magnets are shown at 11 in Fig. 3, and the driving and resetting of the counter is effected by meansof a hand lever 12, Figs. 1 and 2. The lever 12 is fixedly mounted on a geardisk 13, and tocompel a complete stroke of the handle a full stroke ratchet and pawl mechanism 14 of the usual form is provided. Parts marked 15 and 16 and 89 serve to stop the rotation of the handle after one complete revolution. thereof. The initial handle movement through the gear teeth 18, pinion 20, etc., restores the counter to zero.

V In the present machine, for the proper cyclic operation it is necessary that the counter driving shaft make four complete revolutions for each single revolution of the handle. This is necessary, since there are four complete adding steps in the cycle employed in the present machine. 'lo effect this rotation of the shaft a gear 21 (Fig. 3) is provided mounted upon a shaft 22 extending to and intermeshing with the gearmg diagrammatically'illustrated in .Fig. 3 to effect the rotation of the counter drive shaft. The pinion 21 is adapted to intermesh with gearing 23 and actuate the counter after the resetting operation is completed. Gear 23 is adapted to impart the first two revolutions to thecounter. A gear 24 upon its inter-meshing with the driving pinion 21 is adapted to impart the second two revolutions to the counter.

To control the. multiplving operation a keyboard of conventional formjis provided. This consists of a series of multiplier kevs 25 and a series of multiplicand kevs 26.

These keys are preferably of" distinctive color or design'and it will be understood that any numberof rows of keys may be employed as desired; In the present embodiment tens and units multiplier and multiplicand keys only are shown. The keys latch or detent 27, Fig. 3. At a'proper time in the cycle the lat h plate 27 is tripped by means of a suitable pivoted tripping member 28 which is operated by a pin'29 on the gear disk. This construction is common in adding machines, and it is sufiicient here to state that the keys are pressed upwardly by individual springs and 'the depression of one key releases the others. Each of the multiplier keys and each of the multiplicand' keys are adapted, upon "depression, to close conta ts designated 30 These contacts are shown diagrammatically in the circuit diagram, Fig. 17. One side of the circuit extending to these contacts 30 for the multiplier keys passes through 'cam contact controlling devices 31. 32 which permit a flow of current from the line and the battery 32 at the proper time in the operation of the machine. It may be here explained that there are four pairs of cam contact devices which are respectively marked 31, 32.

33. and 34 in Fig. 4. These cam contact devices are mounted upon a shaft 35. which shaft makes one omplete revolution for each revolution of the shaft 36 (see Fig. 4) The shaft 36 in turn is directly connected to upon being depressed are ada ted to be latched down by the usual flexible keyboard closure of the individual contact circuits by thekeys of the multiplier is adapted to select a tion..

nets, 38,-

ii;rticular multiplying is selection is e e ted through magclosure of the cam of the main circuit by the select its which are cam contact devices current is allowed to flow to one orthe. other ofthese'magnets to energize the same and-attract the armatures 39.. These individual armatures are connected by individual rods 40 to plates 41 pivotally mounted upon aroek shaft carrying the rock lever 42. The lever 42 cooperates'with a cam member 43 fixed on shaft 35 and having two high portions so as to ro"k the lever 42 against the tension of a return spring 42, Fig. 7, in a counterclockwise direction twice for each revolution of the handle. Upon the swinging of 'any latch plate 41 a linkage 44 will be'disposed into such position as to cooperate with the depending finger 45 under a-particular multiplylng slug and thereafter elevate the same upon the rocking of the lever 42. In the illustrated embodiment there are nine multi-- plier keys for the units column and nine for the tens column. There are, therefore, accordingly, eighteen multiplying slugs utilized, and the depression of any key will particular multiplying slug for elevation.

For a further understanding of'the machine, a brief explanation will be given of 'sidered that 47 is to the multiplyingsteps which are performed by reference to an example. It will be conbe multiplied by 86.

- Multiplying 6 by 7 gives 42 and 6 by 4 gives 24. The organization of the machine.

howeveig'is such that the two in the units column of the sub-product 42 must he set up concurrently in the machine with the four in the tens column of theproduct of 6 times 4. This amount will be first added in to the counter. Subsequently there will be an adding in of 24 which constitutes the multiplication of 6 times 4 in the hundreds column and the multiplication of 6 times 7 in the tens column. These amounts being turned into the counter, we still have to add in the multiplication of 8 times 47 with proper allowance for the decimal point. Multiplying 8. times 7 gives 56 and 8 times 4 gives 32. In adding these sub-multiplications into thecounter the 6 will be added in the tens column of the counter concurrently with the adding in of'2 derived from the multiplication of 4 times 8 in'the hundreds column- Finally. upon the last counter revolution there will be added in 5 in From the above it will be seen that in any given multiplication the one magnet being provided for each multiplying slug. Upon the closure of a circuitby the keys of the multiplier and the the selecting of th heretofore explained, but also employ a sun- I successive counter cycles. 42, for example, slug for opera:

derived by the multiplication of 6 times 7 is not added in all at once, butthe 4 in the tens column is added in at the second revolution. For the'purpose' oi thus factoring the multiplying operation, I employ not only e-slugs for operation as counter revolutions. In the embodiment "shown wh ere four counter-revolutions are employed the sunflowers are divided 'into four sectors and the contactcr operation is so timed sector during the first revolution of the that-it pames through the first counter and through the second sector'durm the second revolution, and so on.

The sunflower devices comprise a plurality of insulated segments 46, 47, 48 and 49 (Fig. 4). These segments are provided with individual contacts arranged in successive spaced sectors, as best shown in Fig. 5. 50 being the first sector, 51 being the second, 52 the third. and. 53 the fourth. The segments .or sunflowers proper are, fixedly supported in the machine by means of the brackets 54, see Fig. 3 for instance. Extending through the segments is a shaft 56 which is journaled for rotation in the machine frame. hub portion 57 is fixed on the shaft. Said disc carries a pawl 57 Spring-pressed into engagement with a ratchet 57. The ratchet is fixed on a sleeve .57 which is loosely mounted on the shaft 56. Also fixed on the sleeve is a pinion 58 meshing with a segment ear 59 on alever 60, Fig. 3. pivoted at 60' and having a follower r ller cooperating A clutch disc 57" having a.

viewed in Fig. 3 will tion of ratchet 57 as viewed in Fig. 9. And this will. through the pawl 57 and disc 57 cause rotation of shaft 56. U ward movement of the segment gear will cause the reverse movement of'the ratchet 57. but the shaft 56 will remain idle. A pawl 57 may be emploved to prevent retrograde movement of the disc 57". As shown. the cam 61 is of a box type and is so arranged .as to first permit an initial dwell o the sector ever 60 during the resetting of the counter. hereafter. the first rise rocks the sector in turn rotating the shaft 56 and causing contact blades 61. 62. 63. 64. etc.. to sweep over the contact points of the first sector 50 of the sunflowers. This operation takes p ace, during the first revolution of the counter,

cause clo kwiserota- I the digital steps ofwhich are synchronized with the passage of the sunflower brushes 61 over thecontacts on the sunflowers by reason of the connection of the counter clutch shaft to shaft 36 through the gear chain 10 and the connection of the brushes 61 to the same shaft through the segment gear 59 and its actuating cam 61. Upon the second revolution pf the counter the next cam rise sweeps the switch arm over the second contacts 51. Following this there is a period of dwell in the cam to permit the contact arms to remain stationary during the restoration of the multiplying slugs prior to a second operation. Thereafter. there are two or,more elevated portions on the cam which effect the sweeping of the contactors over the contact points of sectors 52 and 53, respectively. After the switch blades have made one complete revolution the lever 60 is restored, and during this restoration movement the switch blades remain stationary on accountof the ratchet Referring to and pawl connection.

The number of sunflower units employed will depend upon the number of wheels which are to be operated to display the product. sunflowers. Each sunflower corresponds to a particular denominational order of counter magnet 11 and the common contacting brush of each sunflower is wired to its corresponding counter magnet 11. Referring now to the diagram, Fig. 15, the arm 61 is connected to the units counter magnet 11, 62 to the tens counter magnet 11", 68 to the hundreds counter magnet 11", and 64 to the thousandths counter .magnet 11. These arms, when they establish a current through a live contact of the sunflowers. serve to clutch the individual registering wheels to the register shaft and effect the addition in the usual manner.

Multiplying slugs. V

In the present embodiment it has been assumed that there are two rows of keys, uni s and tens. in both multiplier and multiplicand banks. For each multiplier key there is a corresponding multiplier slug, or eighteen all together. These slugs are all of substantially the same me hanical construction. but difier only in the nature of their cross or transposing circuit connections.

Figs. 7 and 8, each slug comprises a metal plate 65 passing through a rectangular plate of insulating material 66.

, Fach end of the metal plate is slotted and through theseslots pass guide bars 67. All of the slugs, except the particular ones selected for elevation. are normallv held down by spiral springs 68. Along the left edge of'each plate 66 are ten evenly spaced contacts 69, and upon the rearedge of the plate at the same side thereof are corre- As shown, there are four of these spondingly evenly spaced contacts 70. At the right edge of the insulating late there are corresponding contacts 71 an 72. The slug assembly as a whole and the spring contacts 69. 70, 71 and 72 are arranged to slide between insulated bars 73, 74, which are correspondingly provided with ten evenly spaced contact plates 75, 76 and 77, 78, as shown in Fig. 8. Y

Each multiplying slug carries two sets of transposition wires, one set marked 79 on one side of the insulated plate, and the other upon the rear side. The arrangement of transposition wiring is best shown in Fig. 14, which shows the front and back wiring for each individual slug. The transposers 79 are digital transposers and the transposers 80 are the tens transposers. This will be understood by an examination of .tlie transposer for slug 2. Taking the contact opposite the numeral 4 multiplying by 2 will give 8, which is the value of the contact S at the right-hand side to which the transposing wiring extends; On the other hand. for the tens transposing wiring all amounts of less than 5 extend togthe zero contact, since 4 times 2 equals 8, and itis necessary to have at least 5 times 2 before a characteristic one is found in the tens column. o

of multiplying slugs.

The fixed contact plates are wired to the corresponding contacts under the multiplicand keys of the units order. The re lated and adjacent contact plates .76 are wired to the contacts 30. which are below the multiplicand keys of the tens order. As shown in Fig. 4, there are two groups of multiplying slugs with nine in each group. The upper group of slugs in this figure are wired to t sunflowers 48 and 49. The lower slugs, on the other hand, are wired to the units. tens and hundreds sunflowers 46 and 47. Plates 77 are wired to the individual contacts of the units sunflower 46. Plates 78. on the other hand, are wired to the individual contacts of the tens segment 47. A similar wiring is, likewise provided for the front andback plates on the. upper set of multiplying Slugs; tacts of the hundreds and thousands sun flowers in a similar manner.

Referring now to Fig. 4, it that there are eighteen slugs.

will be seen (Certain of these have been broken away to show the construction underneath.) The lower group are for convenience-designated X and are those slugs which are primarily selected by the units multiplier keys. The upper group, designated Y, are those primarily selected by the tens multiplier keys.

The wiring to the with these slugs will'now be described. It

contacts cooperating he tens, hundreds and thousands these extending to the con-" will be understood that the bars 78-74 are fixed and that no circuit is established to contacts 7576 or 77-.78 carried by them I until tlrnfaarticular slug has been selected and eleva to all the contacts 6970 and- 71-72 therewit Assume that the :multiglication is to be performed of. 47 times 6. The multiplication is efl'ected'by' means of partial products; namely, first by 47 times 6, whlch is again broken up thus-7 times 6 and 4 times 6. Theaddmg in of these partial. products is effected during the first two counter revolutions. This is illustrated diagrammatically in Fig. 18, in which it will beseen that the 2 derived from the digit in the sub-product 42 is added in at the first counter revolution. The 4 derived from the tens column of the product of 6 times is concurrently added in during the first revolution of the counter. During the next revolution of the counter there is added in-the 4 in the tens column derived from the 42 product and the 2 in the hundreds column from the 6 times 40 multiplication.

With the above explanation the circuit. will now be traced.

The depression of the number 6 multiplier key and the closure of the cam contacts 31-32 at the proper time in the machine cycle establishes a, circuit tothe number 6 call magnet 38 and selects the number 6 slug of the X group for elevation. This slug is then subsequently elevated and finds that the number 7 contacts.75.76 of the X group are alive, having previously been rendered so 'by the depression of the units number 7 multiplicand key and the closure of its contacts. A circuit path is then established through the number 7 contacts 69, through transposing wire to the number 2 controlling contact 71-47. and thence through a suitable wire to the number 2 controlling contact on the first sector of the units sunflower 46 (see Fig. 15). At

the same time, the circuit is established through contacts 7 6-70, the number4 controlling contacts 7278 and thence to'the number 4.controlling contact on the second number 6 slug of the X sector of the tens sunflower 47.

Concurrently with the selection of the up, current has flowed acros the cross-wi're'Bl, Fig. 17, to

the number 6 selecting magnet over the Y grou of slugs. This sl va'ter finds that the num v tiplicand keycontact is activeand estabupon being cler 4 'tens mullishes a circuit path as .follows: "through number 4 contact 75.69, number 4 .contact' 71-77 to the number 4controlling contact on the first sector on' the tens. sunflower.

Concurrently on the bank contacts opposite the number 4 multiplicand .key controlled contact, a circuit path is established thus;

from number 4 contact 76 70,-number 2contions of the counter have taken tact 72-78 to. the number 2 controlling contact point on the second sector of the thousands sunflower 48. The partial product of 47 times 6 is now completely set up by the activat on of the proper contacts on the sunflowers. Thus:

Intheaboveproductitistobenoted that the 4 in the first line is derived from .6 times 4 and not 6 times 7.

The Lake counter'is now operated two revclutions, on the first revolution accumulatmg 42 from the first sectors of the sunflowers. After the counter has made one revolution. the usual circuit breaking devices employed in this counter and not herein specifically illustrated break the counter magnet circuits prior to the accumulatin operation upon the second revolution. on on the second revolution the amount 24; i. e., 240, is accumulated from the second sectors of the proper sunflowers. After these two revoluslugs are all released and d to normal position for the next part of the cycle. Thls releasing of the slugs is efiected by the double step cam 43.

It 15 now desired to add in the other partial product; i. e., 47 times 80. Before this operation can be started the number 6 units setting in the multiplier must be inefl'ective. Accordingly, towards the end or directly after the second revolution of the counter the cam contacts 3182 shut oil the supply of current to the multiplier contactsBO under the unit keys. Subsequently, the cam contacts 3334 close and permit the depressed member 8 multiplier ey to select the number 8 slugs on both the X and Y groups for subsequent elevation. As before a. proper cross-wire 81" (Fig. 17) conducts the current from the Y group to the X group. The slugs are then elevated as before and, u n reaching their upper point, find that t e number 7 multiplicand key controlled contact is alive. A' circuit path is now established through the number Shoe, thecontact, through the number 8, left dug cbntacts to the number 6 right slug contact and thence to a wire leading to the number 6 contact point upon the third sector of the tens sunflower 47 (Fig. 16). Similarlyithe back slu contacts establish a circuit the 8 mu tiplicand key'contact through the number 5 contact, andthence to thenumherb-con V contactonthe fourthseetor of the hundreds sunflower 48. This gives a partial product of 7 times 8 or 56. The above selection of sunflower points was obtained by means of the X group of contact point of the third sector of the hundreds sunflower 48. The circuit was also established to the number 3 controlling contact point of the fourth sector of the thousands sunflower 49. This completes the setting of the partial products and the counter then makes two more revolutions; namely, the third and fourth. At the third revolution 26 is added in on the'hundreds and tens Wheels and on the fourth revolution 35 is added in on the thousands and hundreds wheels, thus giving a final product of 4042 set up on the counter.

It will be understood that certain slugs have the wiring of the sub-product contact points extending to a multiplicity of points on the various sunflowers. It will be found, however, that wherever there is a double connection, such double connections are upon successive sectors of the sunflower and the actuation of the counters being only con trolled by one sector at a time, this double energization does not lead to any confusion in the result.

The cam contact devices 31-32 and 33-434: need only be provided for the multiplier keys and the multiplicand keys, upon being depressed, are adapted to directly close their circuits to the fixed contact points on the bars 73. .1

Concurrently with the setting up of the product upon the counter wheels, the prodnot will be set up upon the type wheels 90, Fig. 12. Near the end of the cycle the pin 89, (Fig. 2) strikes the spring retracted lever 92, which is in a suitable manner connected with and serves to operate printing hammer 93. Subsequently, the pin 29 strikes the pivoted member 28 and releases all of the depressed keys. During this part of the c cle the segment is raised and the mac ine is made ready for another operation.

Multiplying machines are not new. but so far as I am aware, there is no machine in which multiplicand and multiplier figures can be in any way set up and their product obtained by as simple and direct an operation of the machine as has herein been set forth. This result is rendered possible in the machine above described by the employment, as I have now pointed out and by the use of what I have termed multiplying slugs and the use of two sets of keys, one set to render active those contacts which correspond to the digits of the multiplicand, the other to select that or those slugs which correspond to the digits of the multiplier and bring them into operative relation with the active multiplicand contacts. I believe this invention to be broadly new. This being the case the menace specific construction of the means which I have shown for carrying outthe invention becomes of secondary importance and may be almost indefinitely modified.

{What I claim as myinvention is '1. In a multiplying machine the combination with contacts corresponding to the digits of the multiplicand and means such as a bank of keys for setting up or connect such contacts with a source or current, of multiplying slugs such as are herein described corres ending to the digits of the multiplier an other means such as a second banlcof keys for selectin the slugs and bringing the selected slugs into operative electrical relation to the multiplicand contacts, a counter and means intermediate the slugs and saidcounter for connecting the active product indicating contacts of the slugs to the appropriate counter mechanisms for registering the numerals corresponding to the active product contacts.

2. In a multiplying machine the combination with contacts corresponding to the digits of the multiplicandr and means such as a banlcof keys for-setting up or connecting the desired contacts with a. source of current, of multiplying slugs corresponding to the digits of the multiplier containing two sets of contacts, one adapted to engage the multiplicand contacts the other electrically connected with the contacts of the first at in such order as to indicate the product of the first named contacts and the digit to which the slug corresponds and other means such as a second bank of keys for selecting the slugs and bringing the selected slugs into operative electrical relation to the multiplicand contacts, a counter and means intermediate the slugs and said counter 't'or connecting the active product indicating contacts of the slugs to the appropriate counter mechanisms for registering the numerals corresponding to the active product contacts. I

3. In a multiplying machine the combination with contacts corresponding to the digits of the multiplicand and means such as a bank of keys for connecting the desired contacts with a source of current, of other means such as a second bank of keys, multiplying-slugs corresponding to the digits of the multiplier and ada ted when selected by the keys of the seconr bank and brought into operative relation to the multiplicand contacts to cohtrol the circuits from thesetive multiplicand contacts to contacts indicatin the product of such active contacts and t e digit to which the selected slug corresponds, a counter and power operated means for continuing the circuit from the said product indicating contacts to the appropriate counter mechanism for registering the numerals which said contacts represent. 4. In a multiplying machine. the combina- 6 slugs for each order of units in the multi licand, a bank of keys for connecting m tiplicant contacts to a source of current, another bank of keys for selecting and moving a to operative position any desired multi 'lv slugs for each or mg slugs, a counter and means interm late the slugs and said counter for connectin the, active product indicating contacts of the slugs to the appropriate counter mechanisms for registering the numerals corresponding to the active product contacts. 5. In a multiplying machine the combination of two rows of stat-ionarycontacts for r the digits of each order of units in the numbers which the machine is adapted to handle as a multiplicand, two corresponding rows of product contacts and nine multiplying slugs for each orderof units in the multi-- plier with cross connections which, when the slugs are brought to operative position connect the active multiplicand contact with the. product contacts which indicate the product of the said active contacts and the digit corresponding to the particular slug selected and brought into operative osition, a counter and means intermediate t e prod uct contacts and the said counter whereby the active product contacts effect a corresponding registration operation of the coun- 'ter.

6. In a multiplying machine the combination of double rows. of stationary contacts for the digits of each order of units in the numbers'which the machine is ada ted to handle as a multi licand, nine multiplying dcr of units in the multiplier with cross connections whichwhen the slugs are brought to operative position connect the active multiplicand contacts with product contacts which indicate the'product .of the active contacts and the digit corresponding to the particular slug selectedand brought-,to operative controllers which successively select and bring into operation the multiplying slugs for the different order of units and throw action, and controllers which product indicating cona series of slugs to regwhich they correspond counter timed circuit cause. the active tacts of the sever ister the numerals to in said counter.

7. In a multiplying machine comprising stationary multlplicand contacts, movable multiplying slugs and such means as keys for connecting the desired multiplicand contacts to a' source of current and or selecting the desired multiplying slugs and a counter, the combination of the following instrumentalities adapted for o eration as follows: a -manuallyoperated diiving shaft, means ister the numerals position, timed circuit operative thereby during the first art of its revolution to zero, means operated during the next part g of the revolution to move the selected multiplier slugs of the first order of units into operative position, means operated during t e next partof the revolution to cause the active contacts of the operative slu to regcorrespondi t ereto on the counter, means operated during the next partof the revolution to throwput of action the selected slugsand to bring into action slugs corresponding to the next higherorder of units, means for causing the active contacts of, such slugs to operate the counter, and means operated during the next part of reset the counter w eels tothe revolution toprint the total registered by the counter.

8. An electrical multiplying device comprilsing setting elements for the multiplier am counter, and means for controlling countercontrolling circuits conjointly by the multiplier and multiplicand setting elements to thereby control the actuation of said counter to accumulate the product.

9. An electrical multiplying device comprising setting elements for the multiplier multiplicand, an electrically-controlled and multiplicand, an electrically controlled" device upon which the product is set up, .and means for conjointly controlling electrical circuits by plicand settin operation of tie-said device and setting up the product thereon.

10. In a calculating device, an accumulator, means for actuating the same, a plurality of electrical contact elements representing multiplication tables for controllin said operating means, and multiplier and multiplicand eys for controlling the operation of said elements.

In a calculating device, product receiving means, for controlling the actuation of said product receiving means, means comprising multiplying slugs includin adapted to establish di erential circuits in accordance with the selection of circuits leading thereto for controlling the last mentioned means and multiplier and multiplicandsetting elements for selecting said slugs for operation and for circuits leading theret 12. In a calculating machine, in combinat1on with means adapted to receive a plurality of successive sub-product items, means comprising keys for settin up multiplier. and multlplicand items which form said sub-products, means controlled by certain keys for selectively selecting electrical transposili fmeans for operation, means con trolled by other of said keys for selecting circuits for cooperation with said selected transposing means, and controlled by the electrically controlled means electric circuits selecting the electrical ferential devices,

'transposing means circuits and bv said for controlling elements which are adapted to control the entering of the items i to sub-product receiving means. I

13. In a multiplying machine, lator, electrical actuating means for said accumulator, contact-making means having multiplication table characteristics for controlling said actuating means, and multiplier and multiplicand setting-up means for controlling sai contact-making means.

14. In a multiplying machine, an accumulator, electrical actuatin means for said accumulator, contact-making means having multiplication table characteristics for controlling said actuating means, means for setting up said contact-making means, and

conjoin'tly selected means for timing the operation of said contact-making means.

15. Ina multiplying machine, an accumulator, actuating means therefor, a plurality of electric contacts associated with said actu ating means for rendering the same operative, means for differentiallyinterconnecting said contacts for determining the effect thereof upon said actuating means, and. multiplier and multiplicand setting-up elements for controlling the efiectiveness of said interconnecting means. K

16. In amultiplying machine, means adapted to receive products, difierential actuating means therefor, a plurality of electric contact with provisions for controlling circuits which in turn control said difmeans for difierentially interconnecting said contacts for determining the efiect thereof upon said differential devices, and multiplier and multiplicand setting up elements for controlling the efiectiveness of said interconnecting means.

17. In a computing machine adapted for multiplying, comprising in. combination, an electrically controlled accumulator, electrically controlled means for setting up items to be added into said accumulator, and timing means for controlling the order in which the several items are so added.

18. In a computing machine, an electrically controlled accumulator, multiplier and multiplicand setting elements, means controlled by said elements "for setting up subprodu'cts, and controlled timing means for establishing electrical .circuits for successively introducing said sub-products into said accumulator.

19. In a multiplying machine, a plurality of electrical transposing members representing multiplication tables, means for selectively rendering said members operative in accordance with a digit of the multiplier,

means representing a'digit of the multiplicand adapted to cooperate with said member for producing a product, and means for receiving such product.

an accumumama-1'9 20. In a multiplying machine, a plurality of electrical switching members representing multiplication tables, means for selectivel renderin said members operative in accord ance wi a digit of the multiplier, means re resenting a, digit of the multi licand a agted to cooperate with said mem r for pro ucing a. partial product, and means for accumulating a plurality of said partial products.

21. In a multiplying machine, a plurality of members having electrical circuits therein with multiplication table characteristics. setting product and adapted to control the cooperation of other circuit devices with said members, and product representing means controlled in accordance with such cooperation. 22. A multiplying device comprising in combination a set of multi lier keys, a set of multiplicand keys, electrical devices conmeans representing one factor of the trolled by said keys for forming products,v

them to .form products in a plurality of decimal orders, a tota izer, and devices controlled by the closed contacts for transmitting to the totalizer-the products on the contact device's. V

24. In a device of the character described, a. plurality of rows of multiplier keys, a plurality, of rows of mutiplicand keys, a plurality of contacts constructed and connected to represent products, means jointly controlled by the multiplier and multiplicand keys for selecting contacts and closing them to form a plurality of partial products a totalizer, and means controlled by the aforesaid contacts for successively entering the partial products on the totalizer.

25. In a device of the character described, a. plurality of rows of muitiplier keys, a plurality of rows of multiplicand keys, a plurality of contacts constructed and connected to represent products comprising a plurality of decimal orders, means 'jointly controlled by the multiplier and multiplicand keys for selecting.- contacts and closin them to form products in a p'urality of decimal orders, a totalizer comprising an element for each decimal order, and means controlled by denominational groups, a plurality of mulof rows of multiplicand keys. a

led by the keys for selecting contacts and closing means and mu tiplicand keys of correspondmgdetiplicand ke s arranged in denominational groups, a p urality of contacts constructed and connected to represent products conlisrising a plurality 'o denominational o era, ointly controlled by the multiplier nominationalgrou s for closin said contacts to form products m a plurality of decimal orders, a totalizer comprisingan element for each decimal order, and means controlled by the aforesaid contacts for actusting the elements of the totalizer singly or 1n groups according to the number 0 the products. 27. In a device of the character described, a plurality of multiplier keys arran in denominational groups, a plurality o multiplicand keys arranged in denominational groups, a plurality of contacts constructed and connected to represent products, means controlled 'ointly by the-multiplier and mulform: movement at each operation, a second -an'ism under the control of the the tiplicand eys for closing the contacts to represent a lurality of partial products, a totalizer, a p urality of devices having a uniset of contacts for eac denominational order, and means controlled jointly by said,

devices and said second set of contacts for entering products on the totalizer.

28. In a machine of the character described, the combination of a set of multiplier keys arran d in groups correslpondi to decimal ordzrs, a set of multip lcand fie s arranged in groups corresponding to e grouping of the multiplier keys, a pluralit'g of contacts arranged in decimal'groups an connections between contacts and grou of contacts corresponding to various p ucts, a second plurahty of sets of contacts grouped to correspond with a plurality of decimal orders and electrical connections between the contacts in said second contacts.

29. In a machine of the character described, the combination of a set of multiplier keys arranged in groups correslpondmg to decimal orders, a set of multi 1candkeys arranged in groups correspon 'ng to grouping of the multiplier keys, a plurality of contacts arranged in decimal groups and connections between contacts and groups of contacts to represent various products, devices jointly controlled by the multiplier and multiplicand keys to close said contacts to set u thereon a separate product for each decimal order in which keys are -0 rated, and mechanism controlled by t 0 contacts for setting up the numerical values of said products.

30. In a machine of the class described, the combination of multiplier ke ar in groups corresponding to decimal orders, a set of multipldifand he s arr groups correspon to t egroupmg' o the multiplier key-1, plurality of contacts sets and the product mauve decimal orders in the grouping of the multiplier keys,

arranged in groups and connections between contacts and roups of contacts corresponding to multip ication tables, devices jointl controlled by the multiplier and multiph cand keys for selecting and closing contacts to re resent secon plurality of sets of contacts grouped to corres 'nd orders, e ectrical connections between the contacts in said second sets and the product contacts, and difierential mechanism controlled by the second sets of contacts.

31. In a' machine of vthe character dethe combiiation of a set of miiltip ier eys arrange in u s corres n n to decimal orders, a set di ni ultiplica zd key arranged in decimal'groups, a lurality of grou s of contacts and means or connect ing tie contacts and groups of contacts to correspond with multi lication tables, devices ointly controlled by the multiplier and multiplicand keys for selecting and closing contacts, to represent roducts of the key values, differential mec anism, and means for operating the differential mechproduct contacts.

32. In a machine 'of the character desclribeilx, .the combiniation of a set of multi er eys arran m ups corres on ig to decimal ol i ers, a 5520i multi l icand keys arranged in groups corresponding to the grouping of the multi lier keys, a plurality of contacts arranged 1n decimal rou s' and connections between contacts m' t e same and other groups to re resent products, devices jointly contro led by the multiplier and multiplicand keys for selecting and closing contacts to set up on said contacts a plurality of partial products'correggonding to the values of'the keys 0 era and devices controlled by the pro uct contacts for successively transferring the partial products to other devices which set up the numerical value of the partial products.

33.'In a machine of the character described, the combination of a set of multiplier keys arranged in groups corres 0nd- 111g to decimal orders, a set of multi hcand keys arranged in groups correspon inglto a p urality of contacts arranged 1n decimal groups .andconnections between contacts in the same and adjoinin groups to represent products, devices joint y controlled by the multiplier and multiplicand keys for selectin and closin contacts to represent a plurality of partial products corresponding to the values of the keys operated and devlces controlled by the product contacts for successively transferrm said partial products to num-' ber set up evices.

34. In a calculating device, nroduct receiving means, electrically controlled means 

